649890822 has 96 divisors (see below), whose sum is σ = 1552493952. Its totient is φ = 180786816.

The previous prime is 649890803. The next prime is 649890847. The reversal of 649890822 is 228098946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2296293 + ... + 2296575.

It is an arithmetic number, because the mean of its divisors is an integer number (16171812).

Almost surely, 2^649890822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649890822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776246976).

649890822 is an abundant number, since it is smaller than the sum of its proper divisors (902603130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649890822 is a wasteful number, since it uses less digits than its factorization.

649890822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 649890822 is about 25492.9563213057. The cubic root of 649890822 is about 866.1906030083.

The spelling of 649890822 in words is "six hundred forty-nine million, eight hundred ninety thousand, eight hundred twenty-two".